If you need to file a claim, you will be required to provide the insurance company with documentation supporting the value of the item that has been damaged. Most of this will be found within the WAX app if you've uploaded the relevant pictures and documents during the process of adding your collection in. Acceptable documentation includes:
Appraisals
Purchase invoices or receipts
An inventory list with a detailed description of the item and value
A loan agreement documenting value
Photos
Videos